Piston ring



y 27, 1941- J. H. BALLAR-D 2,243,064

PISTON RING Filed Feb. 12, 1940' \nveflbv dohn Ll. 'Baflwd aw-w. a

ures.

Patented May 27, 1941 T o ms- PISTON RIN G I John lLBallard to Sealed Power North Muakezon, Mich, assignor- Corporation, a corporation oi Michigan Muskegon, Mich,

Y Application February 12, 1940, Serial No. 318,573

3 Claims.

This invention relates to piston rings and more particularly to the quick seating type of piston ring.

The purpose or a quick seating ring is to con- 1 form its periphery to the cylinder wall in a minimum time and it is accomplished by providing drawing, in which,

Fig. 1 is a perspective view of a ring embodying this invention.

Figs. 2, 3 and 4 are each enlarged cross sections of the ring showing different specific forms thereof, and

Fig. 5 is a fragmentary 'view showing cross sections of a plurality of rings clamped together for machining with the cutting tool in operating position.

Like numbers refer to like parts in all the fig- The rings shown are of the oil ring type provided with slots I extending completely through them for the passage of oil. The outer periphperipheries is represented by R in the various figures.

or the ring. The radius jacent These piston rings usually have their peripheries finished in a lathe'in which they are clamped in v In other words, that portion of the surface or the periphery adthe flat surfaces of the rings so closely claims and is to be considered comprehensive of I claim:

1. A piston ring having bearing lands on its periphery adjacent its flat faces, the peripheries of said lands being shaped on axially extending arcs whose centers are located approximately in the planes of the fiat faces of the ring and inside the periphery thereof.

2. A piston ring having drainage passages therethrough between its opposed flat sides and v having-a continuous oil collecting annular groove around the ring at its outer curved portions, said groove being located between two ribs and the groove having communication with said drainage passages, said ribs having outer bearing land surfaces to cooperate with a cylinder wall of a cylinder in which the ring is adapted to operate, said bearing land surfaces of said ribs each be- 10 the outer sides of which are in the same planes with the flat sides of the ring and the inner sides 0! which are spaced from said 011 passages in the Y ring, the outer edges oi. the ribs each curving inwardly in the arc of a circle to the groove from 15 each outer fiat side of the ring.

JOHN H. BALLARD. 

